.nav {
  width: 180px;
  position: fixed;
  height: 100%;
}
.nav .ant-menu {
  height: 100%;
}
.main {
  margin-left: 180px;
  padding-left: 10px;
}
.main.menuFold {
  margin-left: 80px;
}
.main .main-header {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  border-bottom: 1px solid #ccc;
  padding-top: 18px;
}
.main .breadcrumb {
  flex-grow: 1;
  margin-left: 10px;
}
.main .user-info {
  margin-right: 30px;
  position: relative;
  cursor: pointer;
}
.main .user-info:hover .exit {
  display: block;
}
.main .exit {
  background-color: #ccc;
  padding: 5px 10px;
  display: none;
  position: absolute;
  top: 20px;
  left: 0;
  text-align: center;
  width: 100%;
}
